Dan Gutman 
My Weird School #13: Mrs. Patty Is Batty! 

With more than 30 million books sold, the My Weird School series really gets kids reading!Its Mischief Night in this thirteenth book in the My Weird School series! Ella Mentry Schools secretary, Mrs. Patty, gives out the best Halloween candy in the history of the world! So A.J. decides to go to her home for more! The only problem is that her house is haunted! People say she’s a witch and her husband is a ghost. Is it worth A.J.’s risking his life for the best candy ever?Perfect for reluctant readers and word lovers alike, Dan Gutmans hugely popular My Weird School chapter book series has something for everyone. Dont miss the hilarious adventures of A.J. and the gang!